Honda Dual Clutch Transmission will debut in the company's new VFR motorcycles in 2010






Dual Clutch Transmissions (DCT) are still a relatively rare breed, though in the past few years we have been inundated with them in high end automobilesHonda seems completely confident that its new internally-developed transmission (with more than 100 patents pending) will not only be better, but that it will be embraced by the motorcycle community as it intends to introduce the DCT to more of its large-displacement motorcycles, particularly sports models destined for use in developed countries. It certainly would not be committing to such a radical change in its premium sports motorcycles unless it was convinced of the benefits and ease-of-use, as the new technology impacts the most critical area of safety and enjoyment of riding a motorcycle.
In order to suit a variety of riding styles, the transmission is equipped with three operating modes, two full-auto modes (D-mode for regular operation and S-mode for sporty riding); and a six-speed manual mode, which delivers the same shift feel as a manual transmission.
The new transmission features a Dual Clutch Transmission configuration in which independent clutches are employed for the odd gears (first, third, fifth) and the even gears (second, fourth, sixth), respectively. The two clutches operate alternately to effect gear changes. For example, when changing from first to second gear, the computer detects the up-shift and engages second gear, then releases the first-gear clutch while engaging the second-gear clutch to achieve a seamless gear change.
While some dual-clutch transmissions tend to be bulky, the new system employs original technologies such as dual input shafts, exclusive in-line clutch design, and concentration of hydraulic circuitry beneath the engine cover to achieve a compact design. Compactness and lightness is further enhanced through the use of a simple shift mechanism design based on that of a conventional motorcycle shift drum. Optimized shift scheduling achieves fuel economy equal to or better than that of a fully manual transmission, enabling the Dual Clutch Transmission to deliver both sporty riding and environmental performance combined.